Injector



(No Model.)

D. RENSHAW.

INJECTOR.

No. 274,968. Patented A r. 3.1883,

WITNESSES N. PETERS, PhoioLilhngnphsn Washington. D.C.'

UNITED TE PATENT OF ICE.)

DAVID Rn'NsHAw, on BRAINTREE;MASSACHUSETTS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 274,968, dated April 3,1883. Application filed .l'anuaryfifi, 1883. (No model.)

To all whom it may concern:

Be itknown. that I, DAVID RENSHAW, of Braintree, in the county ofNorfolk and State of Massachusetts, have invented certain new and usefulImprovements in Injectors; and I do hereby declare that the following isa full, clear, and exact description of the invention,

which will enable others skilled in the art to sists, mainly, in a novelcombination, with the steam-supply pipe and the transfer conduit orconduits for supplying the gas or fluid to be transferred, of amultitubularsteam-receiver and an enlarged condensing-chamber,

which connects preferably directly with the discharge-pipe, so that, thesteam entering said I condensing-chamber in a multiplicity of jets,

its rapid condensation will be insured.

It also consists in the combination, in an injector, with a multitubularsteam-receiver, of a series of supply-inlets surrounding the same, sothat the gas or fluid to be transferred will surround and enter betweenand among the tubes and flow along the same to their discharge ends,whereby its mingling with and condensation of the steam are facilitated.

The invention further consists in the combination, with thecondensing-chamber, supply devices, and multitubular steam-receiver, ofa water-spray nozzle arranged to force a spray of water into thecondensing-chamber, for the purpose of facilitating the forming of avacuum therein.

In the accompanying drawings, Figure 1 is alongitudinal section ofaninjector constructed according to my invention. Fig. 2 is.a similarsection, showing the injector provided with a water-spray nozzle. Fig. 3is a cross-section of the injector in a plane indicated by the line wasof Fig. 1. Fig. 4 is a similar section on the line y y of Fig. 2.

Referring to Figs. 1 and 3, the letter A indicates theinclosing-cylinder, which is enlarged valve at D. At its rear or outerend of the cylithe main portion by a partition, f, in which are set inannular rows the tubes G, communi- 'in length toward the center of thecylinder.

.the gas or air transfer pipe K. 1 i L is the main steam-supply pipe,which is vided with a stop'cock, M. The steam-chamber isprovided with adraw-off cook, a, for the escape of condensed water, and in the easingof the check-valve is a vent closed by a plug,p, which maybe removed topermit the escape ofair from the condensing-chamber.

' The operation of the injector, as shown in be connected to a reservoiror container from which gas, steam, or air is to be transferred, and thedischarge-pipe G is to be connected with the receptacle to which thesaid gas, steam, or air is to be supplied; or it may be left open to theair if it is merely intended to exhaust the gas, steam, or air from agiven into operation, the plug p is removed and the cock M in thesteam-pipe is turned slightly to supply a small quantity of steam to thesteamchamber, from which it flows through the tubes G to thecondensing-chamber, driving the air therefrom, partly beeomin gcondensed, and a portion being forced through the vent in thecheck-valve casin g. The condensation in the chamber B causes a vacuumtherein, which also extends into the transfer-pipe K, an d. causes gas,air, or other fluid to be drawn through the same and the aperturest'until the condensing chamber is filled. When solid water flows fromthe vent, the plug 17 is to be replaced and the cock M fully opened toturn on a full sup ply of steam, which is rapidly condensed by the waterinthe chamber B and issuing from pipes G, the water at the same timebeing at one end to form the condensing-chamber B, which is contractedat its outer end to jointhe discharge-pipe 0, provided with a checkfinder A is a steam-chamber, E, separated from eating with thesteam-chamber and increasing fconnected with the steam-chamber B andpropoint. When it is desired to start the injector Surrouhding' thecylinder and the inclosed' tubes G is a passage, H, communicating withthe interior of the cylinder by a eircutnferen" tial series ofapertures, i, and connected with:

Fig. 1, is as follows: The transfer-pipe K is to heated and driven pastthe check-valve and through the discharge-pipe O, tending to createbehind it a vacuum, assisted by further condensation of steam, whichlifts a continuing supply of the gas or similar fluid through itstransfer-pipe to the chamber B as long as the steam-cock M is kept open.The subdivision of the steam into small jets by the multitubularreceiver and the provision made for the entry of the moving gas amongthe tubes and at their discharge ends insure a complete condensation andefficient vacuum.

In the m'odifiedcon'struction of the injector illustrated in Fig. 2 itis provided with a water-- spray nozzle or rose-head carried-by a pipe,n, which is arranged through the steam-chamber and the center of thecylinder, said nozzle standing in advance of the tubes G, so that itsspray will have free access to the condensingchamber. By using thisnozzle I secure a more speedy starting of the injectorinto operation. Instarting, instead of first turning on a partial supply of steam at thecock M, I turn on a full supply through pipe 1", and thesteam,issuingtherefrom through. the finely-perforated rose Q in the formof a steam-spray, is very rapidly condensed, and a lifting vacuum isspeedplained the principle and operation thereof, I

wish it to be understood that I do not confine myself to the precisearrangement and construction of parts shown in the drawings andheretofore particularly described, but may vary them in anymauner'tending to more efficiently carry out the principle of myinvention Without departing from its true scope and spirit. I wish italso to be understood that I do not confine myself to the use of myinjector for transferring gaseous or aeriformfluids. as it may be usedfor supplying feed-water to steamboilers, the transfer-pipe K serving insuch case as the water-supply pipe and the discharge-pipe O as thefeed-pipe.

What I claim is'- 1. In an injector, the combination, with the steam andtransfer pipes, of the multitubular steam-receiver, the tubes arrangedto form a cone, as shown, and condensing-chamber, substantially asdescribed. I

2. The combination, with the multitubular steam-receiver, of the seriesof water-inlets surrounding the same, substantially as described.

3. The combination, with the condensingchamber, transfer-conduits, andmultitubular steam-receiver, of the air or water spray nozzle, arrangedin advance of the steam-receiver pipes, substantially as described.

4. In an injector, the combination, with the multitubular steamreceiver, the tubes arranged to form a cone, as shown, and a centralrose-head, of. the steam-chamber E, communicating with the tubesthereof, substantially as described.

5. The injector consisting of the cylinder A, har'ing steam-chamber Eand enlarged condensing-chamber B, the multitubular steamreceiver, thetubes of which communicate with said steam-chamber, andthe passage H,surrounding the cylinder and having communication therewith through acircumferential series of inlets, substantially as described.

In testimony that I claim the foregoing as my own invention I afiix mysignature in presence of two witnesses.

DAVID REN SHAW. Witnesses:

B. F. MORSELL, EUGENE D. OARUSI.

